Supplemental Oil and Gas Disclosures (Unaudited) (Details 2)	12 Months Ended
	Dec. 31, 2013 MBbls	Dec. 31, 2012 MBbls	Dec. 31, 2011 MBbls
Oil [Member]
Reserve Quantities [Line Items]
Proved developed reserves	0	0	95,000
Proved undeveloped reserves	0	0	107,000
Total proved reserves at period end	0	0	202,000
Proved Developed and Undeveloped Reserves [Abstract]
Total proved reserves, beginning balance	0	202,000	6,772,000
Revisions of previous estimates	0	(8,000)	(88,000)
Production	0	(23,000)	(612,000)
Extensions and discoveries	0	0	0
Purchases of reserves in place	0	0	0
Sales of reserves in place	0	(171,000)	(5,870,000)
Total proved reserves at period end	0	0	202,000
Natural Gas Liquids [Member]
Reserve Quantities [Line Items]
Proved developed reserves	0	0	40,000
Proved undeveloped reserves	0	0	60,000
Total proved reserves at period end	0	0	100,000
Proved Developed and Undeveloped Reserves [Abstract]
Total proved reserves, beginning balance	0	100,000	489,000
Revisions of previous estimates	0	39,000	22,000
Production	0	(39,000)	(88,000)
Extensions and discoveries	0	0	0
Purchases of reserves in place	0	0	0
Sales of reserves in place	0	(100,000)	(323,000)
Total proved reserves at period end	0	0	100,000
Natural Gas [Member]
Reserve Quantities [Line Items]
Proved developed reserves	0	0	676,000
Proved undeveloped reserves	0	0	480,000
Total proved reserves at period end	0	0	1,156,000
Proved Developed and Undeveloped Reserves [Abstract]
Total proved reserves, beginning balance	0	1,156,000	25,585,000
Revisions of previous estimates	0	(52,000)	(1,903,000)
Production	0	(311,000)	(3,322,000)
Extensions and discoveries	0	0	0
Purchases of reserves in place	0	0	0
Sales of reserves in place	0	(793,000)	(19,204,000)
Total proved reserves at period end	0	0	1,156,000